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A PTFE envelope gasket consists of a seamless PTFE outer shell and an inner core. Common core materials include non-asbestos fiber, rubber, cork, or corrugated metal, selected based on chemical compatibility, temperature, and pressure requirements.

Corrugated gaskets offer improved sealing performance compared to flat gaskets due to their enhanced compressibility, better recovery, and ability to conform to irregular flange surfaces. They also provide reliable sealing under lower bolt loads and can handle greater temperature and pressure fluctuations.

This article clarifies the structural design, pressure handling, and flange type compatibility that set R, RX, and BX oval ring joint gaskets apart.

Pure expanded graphite gaskets are used to create reliable seals in high-temperature, high-pressure, and chemically aggressive environments, commonly found in heat exchangers, piping flanges, and industrial equipment handling steam, acids, or solvents.

Octagonal ring joint gaskets are designed for high-pressure sealing and can typically handle pressure ratings up to 15,000 psi or more, depending on material, size, and the specific flange standard such as API 6A.

This article explores whether tanged metal reinforced graphite gaskets are suitable for steam applications, evaluating their thermal stability, sealing integrity, and resistance to steam-induced degradation.